LPC47M14X datasheet(167/205 Pages) SMSC

Part #	LPC47M14X

Description	128 PIN ENGANCED SUPER I/O CONTROLLER WITH AN LPC INTERFACE AND USB HUB

PDF	205 Pages

Scroll/Zoom	100%

Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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167 / 205 page

SMSC DS – LPC47M14X

Page 167

Rev. 03/19/2001

Table 71 – Serial Port 2, Logical Device 5 [Logical Device Number = 0x05]

NAME

REG INDEX

DEFINITION

STATE

IR Option Register

Default = 0x02

on VCC POR,

VTR POR and

HARD RESET

0xF1 R/W

Bit[0] Receive Polarity

= 0

Active High (Default)

= 1

Active Low

Bit[1] Transmit Polarity

= 0

Active High

= 1

Active Low (Default)

Bit[2] Duplex Select

= 0

Full Duplex (Default)

= 1

Half Duplex

Bits[5:3] IR Mode

= 000

Standard COM Functionality (Default)

= 001

IrDA

= 010

ASK-IR

= 011

Reserved

= 1xx

Reserved

Bit[6] IR Location Mux

= 0

Use Serial port TXD2 and RXD2 (Default)

= 1

Use alternate IRRX2 (pin 61) and IRTX2 (pin

62).

Bit[7] Reserved, write 0.

Half

Duplex

Timeout

Default = 0x03

on VCC POR,

VTR POR and

HARD RESET

0xF2

Bits [7:0]

These bits set the half duplex time-out for the IR port.

This value is 0 to 10msec in 100usec increments.

0= blank during transmit/receive

1= blank during transmit/receive + 100usec

Note 1: The TXD2_MODE bit is a VTR powered bit that is reset on VTR POR only.

LPC47M14X Datasheet(PDF) 167 Page - SMSC Corporation

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